Signaling and telephone system for railroads.



r w. J. BAILEY. SIGNALING AND TELEPHONE SYSTEM FOR RAILROADS.

APPLICATION FILED DEG.18, 1912.

Patented Sept 9, 1913.

wanna M46, MM

'WARDER a. BAILEY,

F CEDARVILLE, WEST VIRGINIA.

SIGNALING AND TELEPHONE SYSTEM son RAILnoans.

Specification of Letters Patent.

Application filed December 18, 1912. Serial No, 737,469.

Patented Sept. 9, 1913.

- To all whom it may concern:

citizen of the United States of America, re-

Be it known that I, WARDER J. BAILEY, a

siding at Cedarville, in the, county of Gilmer and State of WestVirginia, have invented new and useful Improvements in Signaling andTelephone Systems for Railroads, of which the following isaspecification. i This invention relates to improvements in signaling andtelephone systems for use on railroads and has particular applicatiqn tosystems of this type whereby trains ap proaching each other will causethe operation of signals to notify; the engineers in charge ofsuchtrains of the condition of the track ahead and whereby the engineerof atrain may have telephonic communication with the engineer of anothertrain within the same block and with the despatchers oflice or stationmaster.

In carrying out the presentinvntion, it

is my. purpose toprovide a signaling and telephone system for railwaysin which each train will be equipped with a telephone set which will beautomatically connected in circuit witlrthe telephone set at and wherebythe telephone sets each station as the tram approaches within a certaindistance thereof, and whereby the telephone set on a train at a remotedistance from the station may be connected in circuit with the telephoneset at a station,

on two upproaching. trains will be. automatically conncctedlin circuitwhen the trains are in dangerous proximity or in the same'block, theconnecting of the telephone sets in cirtem of the character above setforth WhlChcuit affecting the energizing of signals to indicate theapproach'of a train to a stat-ion or the approach of one train to another so that telephonic communication may.

be established.

,It is also my purpose to provide a s splicity, efficiency, durabilityand reliability coupled with cheapness of cost in installation and whichwhen once installed may maintained at ami'nimum expense.

' Furthermore, I- aim to providea signal .and telephone system by meansof which communication may be established between a station and a trainapproaching within a given or predetermined zone from thestation'by'meansof a metallic return circuit, or. between the stationanda. train at a con tions.

siderable distance through a ground return circuit, the engineer of thetrain establishing'a ground connection with his tele-- phone s'et'byprojecting a weighted spear or other metallic object upon or into theground.

With the above and other objects in view,

the invention consists in the construction, combination and arrangementof parts hereinafter set forth in and falling within the scope of theclaims.

In the accompanying drawing the figure is a diagrammatic view of asection of track showing the telephone set at one station and on threetrains.

Referring now to thedrawing in detail, the numerals l and 2 designatethe rails of a track, While 3' and 3 indicate the sections of astationary main conductor or third rail extending along the track andsuitably insulated or spaced apart from the rails thereof, thecontiguous ends of adjacent sections being overlapped, as at t, so thattwo trains in adjacent blocks will signal each other in time to avoid anaccident, when such trains are proceeding'in opposite direc- Eachstation, as A, is equipped with a telephone set B of any well known orpreferred construction, one-terminal of the,

set being connected by a wire 5 to the cond-uctor 3, and the otherterminal by way of a wire 6, with the track rail 2. Also at each stationis a hell 7 independent of the bell of the telephone set and having oneterminal connected by a wire 8 with the rail 2 and the otheriermiualconnected through the medium of a wire 5) lo'tho earth as at 10. Asuitable form of switch. 11 is arranged in the wire 9 so that the groundconnection to the bell 7 maybe opened and the terminal l2 of thetelephone set connected to the ground.

', The trains T, 'l", and 'l"-' are each illus- .-trnteddiagrammatically by an axle and apair of. wheels bearing on the trackrails l and 2. Each train carries a telephone self and a partial circuitthereforincluding a, wire 13 connected to one terminal, as M, of thetelephone set and having its free end terminating in'a wheel, brush,shoe or the like 15 mounted on the locomotive in such manner as to rideon the sectional third rail extending along the track, and a wire 16connected to the other terminal of, the telephone set, as 14, and havingthe free end present-instance, being-in the formilof a ably driventheterminal 14. Each train telephone set thereof connected in asuitablemanner with the axle 17 sofas to connect the telephone set to the trackrail 1. Each telephone set includes a receiver 18,-a forked switch 19,

a transformer 20, the primary Windingof which is connected in circuitwith the transmitter 21-and a battery 22, a ringer 23 and. acontinuously rotating magneto 24 suitand connected by a wire 25 with isalso e uippedwith means for obtaining a. groun connection, such means,the

spear 26 connected by la flexible cord conductor-27 with the terminal14, so that the "engineer may-toss or throw the spear from the cab intothe road bed to ground the said terminal-of 'the telephone set.

-rotated, current will flow indicated by the arrows a, such pathconsisting of the wire 25, terminal 14, wire l3,

path indicated by 'b, this conductor 3. wire 5, bell of the telephone B,

wire 6, rail 1, axle 17 of train T, wires 16 and 16, receiver hook 19,bell 23, and generator 24. Theengineer of train T and the'station masterin charge of station A will thus be notified that telephoniccommunication may be had between the train and station for the exchangeof orders or any other purpose. It will be noted that no use has beenmade of the grounding 26 of train T, as thisis unnecessary because thecircuit includes the section 3 of the third rail and is connected withthe station of the telephone sets. When, however, the train is at pointremote from the station, as for instance, train T establishcommunication between his .tele-] phone set and the station set, thegrounding evice is projected into. the ground. The main conductor orthird rail is nowcut out of the circuit andcurrent'flows through thepath consisting of the generator 24, wire 25, flexible conductor27,grounding device 26, earth, wire 9,

call bell 7, Wire 8, track rail 1, axle 17 of the train T wires 16, and16, receiver fork 19, bell-23 and generator 24. The station master, uponhearing the ringing of the bell 7 manipulates the switch 11 soasto'connect 'hi's telephone set incirouit by throwing the switch to thedotted line position. ThlS talking circuit is practically the same asthe ringing circuit except that. the telephone B takes the place'of thecall bell 7.

In order to prevent trains which may be simultaneously running on thetrack in the same direction from signaling each the track ahead, thecircuit or path travand the engineer desires to other, a pole changer 28is connected in the circuit-of each xmagneto 24, between such magnetoand the bell 23 and wire 25, and these pole changers are so arrangedthat the like poles of their sources-of energy are connected to the mainconductor or third rail and to the track or return conductor,

respectively, and when thus arranged the electric currents will opposeone another and consequently prevent the energization of the signals. inthe engines-,fwhen such engines or trains are proceeding in the samedirection. On the contrary, trains running or operatin on the track inopposite directions have thelr signaling apparatus connected to theconductors inreversepolarity, that is, to say, in. series, andwhen thusarranged no two trains proceeding in opposite directions or toward eachother can be on the same block" or section without signaling each other.

Letit now be assumed that trains T and T are approaching each other andare within the danger zone. In this conditiog oi the system, themagnet-0s 24, .24 of the two trains will be connected in series witheach'.other' with the effect toenergize the bells 23,423 inv each enginecab and so warn the engineers in charge ofthe trains of the condition ofersed by the current consisting-of the generator 24 on the train T,bel1'23, switch 19,

wire'16 and wire 16, axle and wheels 17 ,1 the portion of the track rail1 between the trains, axle and wheels 17 of train T wires 16 and 16,switch 19, bell 23,-generatorv 24, wire 25, wire 13, section 3 of theThain conduc-toror third rail and wires 13 and;- 25 of the train T andthe other side of the. gem erator on the last-mentioned train. y'lhus,the bells 23, 23 of the trains are energized. From the foregoingdescription takenin connection with the diagram illustrated in theaccompanying drawing, the construction and modeof operation of myinventionwill be readily apparent. Itwill'be seen that I have provided arailway signaling and telephone system wherein each telephone setemployed is equipped with a partial circuit, such circuits being.rendered complete or connected to one another by way of a main conductoror third rail" and one of the rails of the track We brought wit apredetermined or prescribed zone, and wherein thepartial circuits may beconnected to one another when beyond the prescribed distance andhideperidently of the main conductor-or third rai WhileI have hereinshown and described oneparticular embodiment of my invention .by way ofillustration, I wish it to be under stood that I do not confine myselfto all the precise details of construction herein described anddelineated, as modification and hen such telephone sets are variationmay be made withinthe scope 9f the claims and without departing from thespirit of the invention. L-

I claim:

1. In a railway signaling system, the com bination with the track railsand a mainboth telephone sets when the train is Within a. predetermineddistance of the station, and means for establishing a complete clrcuitbetween the train carried telephone set and the station signalindependently of the station telephone set. 2. In a railway signalingsystem, the com* bin'ation .with the track rails and a main conductor,of a station telephone set, a partial circuit therefor including saidmain conductor and one of the track rails, a station signal independentof thetelephone set, a circuit for such signal including meet the trackrails and a ground connection, a train carried telephone set, a partialcircuit therefor forming with the first-mentioned partial circuit acomplete circuit for both telephone sets when the train is within apredetermined distance of the station, means for es-.

tablishing a ground connection for the train carried telephone set toenergize said station signal, and means for establishing acompletecircuit composed of said partial circuit independently of saidmain conductor;

and when the train is beyond the prescribed distance from the station.

3. In a railway signaling system, the combinationiwiththe track railsand a main conductor, of a station telephone set, a partial vcircuittherefor includinga main conductor and one of the track rails, astation signal independent of the telephone set, a circuit for suchsignal including one of the track rails and a ground connection, a traincarried telephone .set, a partial circuit therefor forming with thefirst-mentioned partial circuit a complete circuit for both telephonesetswhen the train. is within a predeter-- mined distance of thestation, means for establishing a ground connection for the traincarried-telephone set to energize said station signal, and .means forestablishing a complete-circuit composed of said partial cir-.

.cnits independently of said main conductor and for cutting outsaid'station signal.

in presence of two witnesses. WARDER J. BAILEY.

In testimony whereof I alfix my signature Witnesses: v y EDWIN WAGGONER,

TILLM N WILMorH. a

. Copies of this patent may be. obtained for five cents each, byaddressing the Commissioner of Patents,

. Washington, D. (1.3 i

